Stoneworking-machine.



J. 0. GYGER.

STONEWORKING MACHINE.

APPLICATION FILED JUNE 26, 1913.

Patented June 30, 191 1 2 SHEETS-SHEET l.

Inventor I Attorneys J. O. GYGER.

STONEWORKING MACHINE.

APPLICATION TILED JUNE 26, 1913.

Patented June 30, 191L 2 SHEETS-SHEET 2.

I .wpa'gyar nventor 1 a Attor'neys COLUMBIA PLANDORAPH (20., WAS NNNNNNNNNN C UNITED STATES PATENT OFFICE.

JASPER 0. GYGER, 0F BEDFORD, INDIANA, ASSIGNOR 0F FORTY-NINE ONE- HUNDREDTHS TO EDMUND B. THORNTON, 0F BEDFORD, INDIANA.

STONEWORKING-MACHINE.

Specification of Letters Patent.

PatentedJune 30, 1914.

Application filed June 26, 1913. Serial N 0. 776,000.

State of Indiana, have invented a new and useful Stoneworking-lVlachine, of which the following is a specification.

This invention relates to stone working machines particularly designed for channeling or cutting stone.

One of the objects of the invention is to provide a simplifiedstructure having the cutter drills connected thereto in such a manner as to enable the machine to run continuously in chopping or cutting stone until the drill holder or clamp is brought to the surface of the stone thus eliminating the numerous adjustments which have heretofore been necessary before a stone could be cut to a depth of more than three or four-inches.

A further object is to so arrange the drill holder or clamp; as to support thedrills directly in line with the center of force exerted thereagainst, thus greatly increasing the ei'liciency of the machine.

A further object is to provide a novel arrangement of drill actuating levers having adjustable fulcrums whereby the efficiency of the levers as drill actuating means is maintained the same at all times, irrespective of the depth of the out.

Another object is to provide improved means for adjusting the tension of the springs utilized for transmitting motion to the drill holder.

With the foregoing and other objects in.

view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter de scribed and claimed, it being understood that changesin. the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention. i i

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings :Figure 1 is a side elevation of the machine constituting the present invention. Fig. 2 is an enlarged view partly in side elevation and partly in section of the drills and their holder. Fig. 3 is an edge view of the holder and the drills therein. Fig. 4 is a section on line A--B Fig. 1. Fig. 5 is a section on line C-D Fig. 1. Fig. (3 is a side elevation of a portion of the machine and showing a slightly modified structure. Fig. 7 is a section on line l L-F lug. (L Fig. 8 18 an enlarged section on.

line (it-H Fig. 6. Fig. 9 is a side elevation of a portion of a modified form of machine. Fig. 10 is an edge view of one of the long drills used in connection with said modified form and of the clamps combined therewith. Fig. 1.1. is a plan view of a portion of another modified form of machine. Fig. 12 is a side elevation of the parts shown in Fig. 11.

Referring to the figures by characters of reference 1 designates a wheel supported body and mounted on this body preferably at a point adjacent the center of the sides thereof are upstandingparallel guides 9. provided with asuitable connection 3 at their upper ends in which a screw 4 is slidably mounted. This screw is swiveled at its lower end within the upper end portion of a bearing block 5 slidably mounted between the guides. A gear 6 bears downwardly on the connection 3 and engages the screw 1, this gear being rotated in any suitable mannor, as by means of a gear 7 which, in turn, can be rotated by a hand wheel 8 or the like. Thus it will be seen that by means of this mechanism, the block 5 can be raised or lowered between the guides 2.

A motor 9 of any suitable form is mounted on the structure 1 and is adapted to transmit motion through a ear 10 to another gear 11 suitably supported. A plate 19. is secured on one face of the gear and has a wrist pin 13 normally in line with the center of gear 12. This plate, however, can be shifted by inserting its fasteningb'olts 1linto one or more openings 14. in gear 11 so as thus to hold wrist pin 13 off center. A .l'iearing plate 15 is carried by wrist pin 13 and when said wrist pin is off center, will be caused to travel in a circle. This plate 15 is slidably engaged by one end of a main lever 16 which is fulcrumed, as at 17, upon the adjustable block 5. A supplemental lever 18 is fulcrumed upon the block as at 19 and is overhung by the short arm of lever 16. In the structure shown in Fig. 1, toothed U- rods 20 are extended under lever 18 and across the sides of the short arm of lever 16 and are secured, at their upper ends, to a top plate 21. ends ofthe rods 20 and bear downwardly on plate 21 sojtha-t, by screwing these nuts onto the rods, the plate 21 can be shifted toward the lever 16. A coiled spring 23 is interposed between plate 21 and the short arm of lever 16 and another coiled spring 24 is interposed between the short arm of lever 16 and lever 18.

upper ends and mounted upon these guides is a slide 26 having a laterally extending.

portion 27 provided with a transverse opening 28, the'upperand lower walls of this opening beingjpreferably convex, as shown in Fig.2, soas to present rounded bearings for the end. of lever 18,'which end projects into opening 28. The extension or enlargement27 provides a shoulder 29 along the lower portion thereof, this shoulder constituting an abutinent for the upper ends of ciittiiigdrills 30. A clamping plate 31 is adapted to hold these drills against the side of the slide 26," there being tightening screws 32 or'the like for holdingth'e drills clamped between the slide 'and'the plate 31. These drills can be of any desired length, the distance between the slide26 and the active ends of the drills usually being about three fee."

It is to be understood that the machine herein describedis to be mounted upon'a track such as shown at 33 and in operating the machine, motion is transmitted from motor 9 to gear 11' and, if plate 12 is adjusted so as to support wrist pin 13 off center, the rotation of gear 11 will result 'in the oscillation of'the main lever 16. During the downward movement of the short arm of this lever, motion will be transmitted therefrom through spring 24 to the supplemental lever 18 and slide 26 will thus be shifted downwardly so as to drive the bits 3O against the surface being cut. Duringthe upward movement of the short arm of lever 16, spring '23 willpush against plate 21 and thus lift rods 20 and lever 13,thereby raising the bits 30. The springs 231a-nd 24 will thus operate to relievethe machine of cxcessive ar ring. Furthermore as the bits 30 cut down into-the stone, the fulcrum block 5 can be adjusted downwardly so that the mechanism willbe just as effective when the bits are deep in the stone aswhenthe bits are first entering the stone.

Attention is called to the fact that the opening 28 is located directly above shoulder 29 and bits 30sothat the thrust exerted b lever 18 against the slide 26 is along a line extending-'5longitL1di11ally of "the bits. There is therefore no dan er of the slide being tilted laterally out of line as would be the case should power be applied to the slide Nuts 22 engage the upper.

at a point to one side of the longitudinal center of the bits.

Instead of providing two rods for connecting the levers as shown in Fig. 1, a single rod 33, which is substantially U shaped, can be extended under the supple mental lever 34 and along the sides of the short arm of main lever 35, as shown in Figs.

6 and '7, the free ends of the rod 33 being Connected to the structure 1 preferably at one end of the side thereof are upstanding parallel guides 25 suitably connected at their 1 held within a top plate 36 by set screws 37. A spring 38 is interposed between blocks 39 secured'to the upper edge of lever 34: and the lower edge of lever respectively and another spring 40 isinterposed between a block ll which is mounted on lever and a plate 1-2 which is adjustable upon the sides of rod 33. An adjusting screw 43 extends through the top plate 36 and by screwing the same against plate 42, the tension of the springs can be increased.

Importance is attached to the fact that by providing a structure such as described, the lower lever 18 can be made practically straight from end to end and, by utilizing theU-bolts or rods described, the tension of the springsv can be varied at will so that the most effective'drill possible can be produced by the use of the levers and, consequently, the stone will be more rapidly cut than would otherwise be the case. Furthermore, by arranging the drills as shown, the machine can be run continuously in chopping or cutting stone until the clamp or slide comes into contact with the stone surface. Heretofore it has been necessary to unclamp the bits and readjust them after they have been moved every two or three inches into the stone and this has required the expenditure of considerable time and labor. Obviously by eliminating this need of adjustment, the machine is rendered much more efficient.

As shown in Fig. 9 the machine may be provided with elongated guides 44 engaged by upper and lower slides 45 and 46, each 1;

of these slides including a clamping plate -17 whereby longdrills or bits such as shown at 4-8 may be secured to the slides 15 and 46. The lower slide 46 has a projection 19 similar to the extension or enlargement heretofore described and this extension is adapted to receive the end of a lever 50 similar to the lever 18 hereinbefore referred to.

By providing a structure suchas herein described it will be seen that very long bits I can be used.

Instead of providing a slide such as shown, for example, in Fig. 2, a modified form of slide such as illustrated at 51 may be employechthis slide being adapted to work between guides in the same manner as the slides hereinbefore described. In this modified construction, however, the slide is provided upon each of two opposed faces with outwardly extending enlargements 52.

i structure such as shown in Figs. 11 and 12 the force of the blow is always distributed equally to opposite sides of the slide 51, thus preventing lateral bindingon the guides. This structure also permits the use of long drills in the cutting machine.

What is claimed is 1. A stone working machine including an adjustable bearing block, a main lever t'ulcrumed thereon at a point between its ends,

15 a secondary lever fulcrumed thereon at one end, a spring interposed between said levers and bearing tliereagainst, a plate above the main lever, a spring interposed between the plate and the main lever, a connection between the plate and the secondary lever for maintaining all of the springs constantly under compression, means for oscillating the main lever a slide actuated by the secondary lever, and cutting elements carried by the slide.

2. A stone working machine including a bit carrying slide mounted for vertical reciprocation, a bearing block, means for adjustin g the same vertically, a main lever fulcrumed between its ends upon the block, a

supplemental lever fulcrumed at one end upon the block, a spring interposed between the main. and supplemental levers, a spring mounted on the main lever, a member bearing on said last named spring, a connection between said member and the supplemental lever for holding all of the springs constantly under compression, means for adjusting the tension of the springs, said means engaging said connection, the slide being engaged by the supplemental lever.

3. In a stone working machine, the combination with a drill carrying slide mounted for reciprocation, of a bearing block mounted for adjustment along a line parallel with the path of movement of the slide, a main lever fulerumed upon the block and having a short arm and a long arm, means engaging the long arm for oscillating the lover, a supplemental lever fulcruined at one end upon the block, said supplemental lever engaging the slide to actuate it, a spring interposed between the short arm of the main lever and the supplemental lever, a second spring mounted upon said short arm, a member supported by saidsecond spring, a connection between said member and the supplemental lever for holding both springs constantly under compression, and means engaging the connection for adjusting the tension of the springs.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

JASPER O. GYGER. lVitnesses:

EDMUND B. THORNTON, FRED IV. I'IAGKLEMAN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents Washington, D. C." 

